How to Write a Proposal in English as a Non-Native Speaker
If English is not your first language, sending a proposal to a client in the United States or Europe can feel like a test you might fail. You worry the wording sounds off, that a small mistake will make you look less professional, that the client will pick someone who “writes better.” Here is the reassuring truth: clients do not hire the best English writer. They hire the freelancer whose proposal is clearest about what they will get, when, and for how much. Structure beats fluency every time, and structure is something you can control completely.
What a proposal is actually for
A proposal is not an essay and not a cover letter. It is a short, structured document that answers four questions the client already has: Do you understand my problem? What exactly will you do? When and for how much? Why should I trust you? If your proposal answers those four clearly, the English does not need to be elegant. It needs to be unambiguous.
This reframing takes the pressure off. You are not being judged as a writer. You are being judged as someone who can be understood and relied on. Short, plain sentences do that better than complex ones, which is good news when English is your second language.
The structure that works
Use the same skeleton every time. Reusing a structure is what lets you write faster and make fewer mistakes.
- A one-line summary of their problem. Show you listened. “You need a Shopify store redesigned so mobile checkout stops losing sales.” One sentence, in their words.
- What you will deliver. A concrete, numbered list of deliverables, not vague promises. “1. Redesigned product page. 2. New mobile checkout flow. 3. One round of revisions.”
- Timeline. When you start, key milestones, and when they get the final delivery. Even approximate dates beat “soon.”
- Price and payment terms. The total in USD, what it includes, and how and when you expect to be paid (for example, a deposit up front and the rest on delivery).
- A short note on why you. Two or three sentences: relevant experience, a similar project, a link to your work. No life story.
- A clear next step. Tell them exactly what to do to move forward: “If this works for you, reply to confirm and I will send the deposit invoice.”
That is the whole proposal. Six blocks, most of them short.
Language rules that make you sound professional
You do not need advanced vocabulary. You need clarity. These rules do more for how you come across than any fancy phrasing.
- Write short sentences. One idea per sentence. Long sentences are where non-native mistakes hide and where clients lose the thread. Short sentences read as confident.
- Prefer simple verbs. “I will build,” “I will send,” “I will fix.” Plain verbs are clear and hard to get wrong.
- Cut filler. Phrases like “I would like to take this opportunity to” add nothing. Start with the point.
- Use numbers and lists. They cross every language barrier. A numbered deliverables list is understood the same way by everyone.
- Avoid idioms you are not sure about. A misused idiom stands out more than plain language ever will. When in doubt, say it plainly.
- Be specific with dates and money. “Delivered by October 12” and “USD 800, 50% up front” leave no room for misreading.
Common mistakes to avoid
Two mistakes hurt non-native proposals more than grammar ever does.
The first is over-apologizing for your English. Never write “sorry for my English” or “I hope you understand me.” It plants a doubt that was not there and signals you see yourself as a weaker option. Let the clear structure speak for you.
The second is being vague to sound polite. In some cultures, softening every statement feels respectful. In a business proposal in English, vagueness reads as uncertainty. “I think I could probably have something ready sometime next week maybe” undermines trust. “I will deliver the first draft by Thursday” builds it. You can be warm and still be precise.
A simple way to check your proposal before sending
Read it once out loud. If you stumble on a sentence, it is too long or unclear; split it. Then check that every one of the four client questions is answered: Do I show I understand the problem? Is it clear what they get? Are the timeline and price unambiguous? Is the next step obvious? If any answer is no, fix that before worrying about a single word choice.
You can also paste it into a free grammar checker for a last pass on spelling and basic grammar. Use it to catch typos, not to rewrite your voice. A proposal that sounds like a real person is more convincing than one polished into something generic.
Get the pricing right before you write a word
The hardest part of most proposals is not the English. It is the number. If you are unsure what to charge, the price block is where hesitation shows, and no wording fixes an underpriced quote. Work out your rate from your real costs first with the free freelance rate calculator, then turn that into a project quote and track what you invoice with the quoting and payments spreadsheet in USD, so the price you put in the proposal is one you can stand behind.
We are also preparing a bilingual proposals and email kit with ready-to-adapt proposal templates in English and Spanish, built on exactly this structure: it will be available soon.
Disclaimer
This article is general operational guidance and not legal or tax advice. Contract terms, payment conditions, and what a proposal commits you to vary by country and by client. Before signing an agreement or committing to terms in a proposal, review them carefully and consult a professional when in doubt.
Our products and articles are practical tools and informational content. They are not legal, accounting or tax advice. Every country and every payment platform has its own rules: talk to a professional before making tax decisions.